package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书");
        //1.查找你要删除的书籍是否存在
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要删除书籍的名称：");
        String name = scanner.nextLine();

        int currentSize = bookList.getUsedSize();
        int delIndex = -1;
        int i = 0;
        for (; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)) {
                delIndex = i;
                break;
            }
        }
        if(i == currentSize) {
            System.out.println("没有你要删除的书籍");
        }
        for(int j = delIndex; j < currentSize-1; j++) {
            Book book = bookList.getBook(j+1);
            bookList.setBooks(j,book);
        }

        bookList.setBooks(currentSize-1,null);
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功");
    }
}
